Low-voltage circuit fault locating terminal and method used for power distribution substation region

Abstract

The invention discloses a low-voltage circuit fault locating terminal and method used for a power distribution substation region. The fault locating terminal comprises a power distribution transformer monitoring wireless communication module, a power distribution transformer monitoring warning module, a voltage sensor, a current sensor and the like. A power circuit, a fault identifying circuit and a signal indicating circuit are arranged in a power distribution transformer monitoring collecting module. The power circuit, the fault identifying circuit and the signal indicating circuit are mutually connected, the signal indicating circuit is mutually connected with the power distribution transformer monitoring wireless communication module and the power distribution transformer monitoring warning module, a secondary-side winding of the voltage sensor is connected to the power circuit and the fault identifying circuit through signal cables, and a secondary-side winding of the current sensor is connected to the fault identifying circuit through a signal cable. The fault locating terminal can correctly judge access of short-circuit fault currents, fault region information is sent to a background system for locating through wireless communication, and therefore the locating problem of various fault circuit sections and branch circuits is solved.

Description

[0001] technical field [0002] The invention relates to a power distribution automation terminal, in particular to a low-voltage line fault location terminal and a location method in a power distribution station area, belonging to the field of power systems and automation thereof. Background technique [0003] The collection of various real-time operation data of comprehensive distribution transformers, low-voltage distribution networks, large users and low-voltage residential electricity in the distribution station area provides power supply enterprises with a fast, real and accurate understanding of each power supply area and various power users A platform for information such as actual power supply conditions, power quality, load conditions, power consumption, and reactive power; it is to realize real-time monitoring of the power quality of medium and low voltage distribution networks, improve the reliability of power supply for power users, and realize harmonic contro...

AI Technical Summary

Problems solved by technology

[0004] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a low-voltage line fault location terminal and location method for distribution stations, which can correctly determine the path of the short-circuit fault current, and locate the fault location through wireless communication. The information is sent to the background system for positioning, thus solving the positioning problems of various faulty line sections and branch lines

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